ARM: S5PV210: add common HSMMC device helpers

This patch adds sdhci platform helpers required by sdhci-s3c driver.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

6 files changed, 201 insertions, 0 deletions

diff --git a/arch/arm/mach-s5pv210/Kconfig b/arch/arm/mach-s5pv210/Kconfig
index 7d8d93feb63b..9e9700360829 100644
--- a/arch/arm/mach-s5pv210/Kconfig
+++ b/arch/arm/mach-s5pv210/Kconfig
@@ -25,11 +25,32 @@ config MACH_AQUILA
         help
           Machine support for the Samsung Aquila target based on S5PC110 SoC
 
+config S5PV210_SETUP_I2C1
+        bool
+        help
+          Common setup code for i2c bus 1.
+
+config S5PV210_SETUP_I2C2
+        bool
+        help
+          Common setup code for i2c bus 2.
+
 config S5PV210_SETUP_FB_24BPP
         bool
         help
           Common setup code for S5PV210 with an 24bpp RGB display helper.
 
+config S5PV210_SETUP_SDHCI
+        bool
+        select S5PV210_SETUP_SDHCI_GPIO
+        help
+          Internal helper functions for S5PV210 based SDHCI systems
+
+config S5PV210_SETUP_SDHCI_GPIO
+        bool
+        help
+          Common setup code for SDHCI gpio.
+
 config MACH_SMDKV210
         bool "SMDKV210"
         select CPU_S5PV210
diff --git a/arch/arm/mach-s5pv210/Makefile b/arch/arm/mach-s5pv210/Makefile
index c9aad7faf1ff..0b334c79816d 100644
--- a/arch/arm/mach-s5pv210/Makefile
+++ b/arch/arm/mach-s5pv210/Makefile
@@ -27,3 +27,5 @@ obj-y				+= dev-audio.o
 obj-$(CONFIG_S5PV210_SETUP_FB_24BPP)    += setup-fb-24bpp.o
 obj-$(CONFIG_S5PV210_SETUP_I2C1)        += setup-i2c1.o
 obj-$(CONFIG_S5PV210_SETUP_I2C2)        += setup-i2c2.o
+obj-$(CONFIG_S5PV210_SETUP_SDHCI)       += setup-sdhci.o
+obj-$(CONFIG_S5PV210_SETUP_SDHCI_GPIO)  += setup-sdhci-gpio.o
diff --git a/arch/arm/mach-s5pv210/cpu.c b/arch/arm/mach-s5pv210/cpu.c
index 2d4a3d2221c5..c5d53abc92f1 100644
--- a/arch/arm/mach-s5pv210/cpu.c
+++ b/arch/arm/mach-s5pv210/cpu.c
@@ -33,6 +33,7 @@
 #include <plat/clock.h>
 #include <plat/s5pv210.h>
 #include <plat/iic-core.h>
+#include <plat/sdhci.h>
 
 /* Initial IO mappings */
 
@@ -77,6 +78,11 @@ void __init s5pv210_map_io(void)
 {
         iotable_init(s5pv210_iodesc, ARRAY_SIZE(s5pv210_iodesc));
 
+        /* initialise device information early */
+        s5pv210_default_sdhci0();
+        s5pv210_default_sdhci1();
+        s5pv210_default_sdhci2();
+
         /* the i2c devices are directly compatible with s3c2440 */
         s3c_i2c0_setname("s3c2440-i2c");
         s3c_i2c1_setname("s3c2440-i2c");
diff --git a/arch/arm/mach-s5pv210/include/mach/map.h b/arch/arm/mach-s5pv210/include/mach/map.h
index 0254e08590e7..eeb1ca79a6f4 100644
--- a/arch/arm/mach-s5pv210/include/mach/map.h
+++ b/arch/arm/mach-s5pv210/include/mach/map.h
@@ -51,6 +51,8 @@
 
 #define S5PV210_PA_FB           (0xF8000000)
 
+#define S5PV210_PA_HSMMC(x)     (0xEB000000 + ((x) * 0x100000))
+
 #define S5PV210_PA_VIC0         (0xF2000000)
 #define S5P_PA_VIC0             S5PV210_PA_VIC0
 
@@ -81,6 +83,9 @@
 
 /* compatibiltiy defines. */
 #define S3C_PA_UART             S5PV210_PA_UART
+#define S3C_PA_HSMMC0           S5PV210_PA_HSMMC(0)
+#define S3C_PA_HSMMC1           S5PV210_PA_HSMMC(1)
+#define S3C_PA_HSMMC2           S5PV210_PA_HSMMC(2)
 #define S3C_PA_IIC              S5PV210_PA_IIC0
 #define S3C_PA_IIC1             S5PV210_PA_IIC1
 #define S3C_PA_IIC2             S5PV210_PA_IIC2
diff --git a/arch/arm/mach-s5pv210/setup-sdhci-gpio.c b/arch/arm/mach-s5pv210/setup-sdhci-gpio.c
new file mode 100644
index 000000000000..fe7d86dad14c
--- /dev/null
+++ b/arch/arm/mach-s5pv210/setup-sdhci-gpio.c
@@ -0,0 +1,104 @@
+/* linux/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c
+ *
+ * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * S5PV210 - Helper functions for setting up SDHCI device(s) GPIO (HSMMC)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+
+#include <mach/gpio.h>
+#include <plat/gpio-cfg.h>
+#include <plat/regs-sdhci.h>
+
+void s5pv210_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
+{
+        unsigned int gpio;
+
+        /* Set all the necessary GPG0/GPG1 pins to special-function 2 */
+        for (gpio = S5PV210_GPG0(0); gpio < S5PV210_GPG0(2); gpio++) {
+                s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+                s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+        }
+        switch (width) {
+        case 8:
+                /* GPG1[3:6] special-funtion 3 */
+                for (gpio = S5PV210_GPG1(3); gpio <= S5PV210_GPG1(6); gpio++) {
+                        s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
+                        s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+                }
+        case 4:
+                /* GPG0[3:6] special-funtion 2 */
+                for (gpio = S5PV210_GPG0(3); gpio <= S5PV210_GPG0(6); gpio++) {
+                        s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+                        s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+                }
+        default:
+                break;
+        }
+
+        s3c_gpio_setpull(S5PV210_GPG0(2), S3C_GPIO_PULL_UP);
+        s3c_gpio_cfgpin(S5PV210_GPG0(2), S3C_GPIO_SFN(2));
+}
+
+void s5pv210_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
+{
+        unsigned int gpio;
+
+        /* Set all the necessary GPG1[0:1] pins to special-function 2 */
+        for (gpio = S5PV210_GPG1(0); gpio < S5PV210_GPG1(2); gpio++) {
+                s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+                s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+        }
+
+        /* Data pin GPG1[3:6] to special-function 2 */
+        for (gpio = S5PV210_GPG1(3); gpio <= S5PV210_GPG1(6); gpio++) {
+                s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+                s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+        }
+
+        s3c_gpio_setpull(S5PV210_GPG1(2), S3C_GPIO_PULL_UP);
+        s3c_gpio_cfgpin(S5PV210_GPG1(2), S3C_GPIO_SFN(2));
+}
+
+void s5pv210_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
+{
+        unsigned int gpio;
+
+        /* Set all the necessary GPG2[0:1] pins to special-function 2 */
+        for (gpio = S5PV210_GPG2(0); gpio < S5PV210_GPG2(2); gpio++) {
+                s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+                s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+        }
+
+        switch (width) {
+        case 8:
+                /* Data pin GPG3[3:6] to special-function 3 */
+                for (gpio = S5PV210_GPG3(3); gpio <= S5PV210_GPG3(6); gpio++) {
+                        s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
+                        s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+                }
+        case 4:
+                /* Data pin GPG2[3:6] to special-function 2 */
+                for (gpio = S5PV210_GPG2(3); gpio <= S5PV210_GPG2(6); gpio++) {
+                        s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+                        s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+                }
+        default:
+                break;
+        }
+
+        s3c_gpio_setpull(S5PV210_GPG2(2), S3C_GPIO_PULL_UP);
+        s3c_gpio_cfgpin(S5PV210_GPG2(2), S3C_GPIO_SFN(2));
+}
diff --git a/arch/arm/mach-s5pv210/setup-sdhci.c b/arch/arm/mach-s5pv210/setup-sdhci.c
new file mode 100644
index 000000000000..51815ec60c2a
--- /dev/null
+++ b/arch/arm/mach-s5pv210/setup-sdhci.c
@@ -0,0 +1,63 @@
+/* linux/arch/arm/mach-s5pv210/setup-sdhci.c
+ *
+ * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * S5PV210 - Helper functions for settign up SDHCI device(s) (HSMMC)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+
+#include <plat/regs-sdhci.h>
+#include <plat/sdhci.h>
+
+/* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */
+
+char *s5pv210_hsmmc_clksrcs[4] = {
+        [0] = "hsmmc",          /* HCLK */
+        [1] = "hsmmc",          /* HCLK */
+        [2] = "sclk_mmc",       /* mmc_bus */
+        /*[4] = reserved */
+};
+
+void s5pv210_setup_sdhci_cfg_card(struct platform_device *dev,
+                                    void __iomem *r,
+                                    struct mmc_ios *ios,
+                                    struct mmc_card *card)
+{
+        u32 ctrl2, ctrl3;
+
+        /* don't need to alter anything acording to card-type */
+
+        writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, r + S3C64XX_SDHCI_CONTROL4);
+
+        ctrl2 = readl(r + S3C_SDHCI_CONTROL2);
+        ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK;
+        ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR |
+                  S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK |
+                  S3C_SDHCI_CTRL2_ENFBCLKRX |
+                  S3C_SDHCI_CTRL2_DFCNT_NONE |
+                  S3C_SDHCI_CTRL2_ENCLKOUTHOLD);
+
+        if (ios->clock < 25 * 1000000)
+                ctrl3 = (S3C_SDHCI_CTRL3_FCSEL3 |
+                         S3C_SDHCI_CTRL3_FCSEL2 |
+                         S3C_SDHCI_CTRL3_FCSEL1 |
+                         S3C_SDHCI_CTRL3_FCSEL0);
+        else
+                ctrl3 = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0);
+
+        writel(ctrl2, r + S3C_SDHCI_CONTROL2);
+        writel(ctrl3, r + S3C_SDHCI_CONTROL3);
+}